This  is a two-stage process.
Employers must carry out re-enrolment every three years.

Firstly, staff who opted out of their workplace pension must be put back in.
Secondly, employers must complete and submit the online re-declaration of compliance form to show The Pension Regulator how they have met this responsibility.

Re-enrolment is a straightforward two-stage task but employers should ensure they leave enough time to carry it out correctly. Visit The Pensions Regulators website for more information.